282 CEYLON PEARL OYSTER REPORT. 



Branchiae commence unifilar on segment V. (3rd foot), tri filar on VI. and VII., 

 sexfilar on VIII. , then multifilar ; they decrease rapidly after the 30th foot and cease 

 after the 43rd. Antenna? snbmoniliform, impar stretching over 11 segments. Setae 

 normal ; acicular setae trifid, as many as four in the posterior segments. 



Eunice siciliensis, Grube. 



Graviek, " Ann. Mer Rouge," ' Arch. Mus. Paris ' (1 ser.), ii., 1900, p. 261. 

 Ckossland, 'P. Zool. Soc. London,' 1904, p. 323. [= Eunice valida, Gkavier.] 



Station V., off Chilaw, Gulf of Manaar, 11 fathoms. Also from South-west Cheval 

 Paar, 13th November, 1902. 



Branchiae commence on the 62nd setiger and remain simply filiform throughout. 

 This well-known and widely distributed species can be recognised by the incurved 

 rami of the lower jaw-plates. 



Eunice tubifex, Crossland. 



Station LIX., Muttuvaratu Paar, without tube. 



This is a worm of large size, one specimen measuring 120 millims. by 5 millims. 

 It is distinguished by the occurrence of spinigerous setae in the anterior segments and 

 falcigerous setae in the posterior region. I have nothing essential to add to the 

 excellent description given by Mr. Crossland (' P. Zool. Soc. Lond.,' 1904, p. 303). 



The branchiae commence as a small bud on the 20th segment and continue as a 

 single filament, increasing in length to the 45th segment, after which a second filament 

 appears. By the 100th segment there are still only three filaments; by the 200th 

 there are four long filaments. Further back the number of branchial filaments 

 increases to five, all arising from a very short axis ; filaments subequal, much longer 

 than dorsal cirrus ; the latter increases somewhat posteriorly. 



Some statements in a footnote on p. 308 of Mr. Crossland's paper require to be 

 modified. Schmarda's account of Eunice depressa from Auckland, New Zealand, 

 which also possesses the two kinds of compound setae, is fuller than many of his 

 descriptions ; this worm is, however, a Marphysa, since, as shown and stated by 

 Schmarda, tentacular cirri are absent. Grube named two species of Eunice with 

 spinigerous setae from the Philippines, namely, E. impexa and E. megalodus, but 

 records no distinction between the anterior and posterior setae. 



There is a headless fragment over 150 millims. long accompanying the specimen 

 above described. 



Marphysa chevalensis, n. sp. 



Locality : South-east Cheval Paar, Gulf of Manaar. 



This species belongs to the same group as Marphysa depressa (Schmarda, ' Neue 

 Wirbellose Thiere,' ii., 1801, p. 127, New Zealand) and M.fallax, Marion et Bobretzky 



